有这样一则寓言:两只小鸟蜷缩在鸟巢里,等待着外出觅食的妈妈回来。可是几个小时过去了,妈妈还没有回来,它们饿得肚子咕咕直叫。其中一只小鸟说:“我要展翅高飞出去觅食,也许一开始有些困难,但我不会失败,因为我们生下来就是要飞的。”它的弟弟担心地对它说:“你千万别飞,因为? There is such a parable: Two birds curled up in the nest, waiting for the mother who came back for food to come back. But a few hours passed and my mother had not yet returned. They were hungry and screaming. One of the birds said: “I have to fly high and fly for food. Perhaps it may be difficult at first, but I will not fail because we are born to fly.” Its younger brother said to him with worry: "You Don’t fly, because?